Lensless imaging FlatCam [1]} and DiffuserCam [2]} are novel imaging systems which get rid of the conventional lens optics. Instead, they use amplitude and diffuser mask respectively to encode light coming from different parts of the scene onto the sensor. As a result, information localized at a point in the scene gets spread throughout the sensor, making priors essential for accurate recovery of the image. These works use traditional reconstruction algorithms such as Total Variation norm and Tikhonov regularization which are quick but do not provide natural looking reconstructions.
